Do they all have the same passphrase? You can decrypt multiple files in PGP Viewer, not sure if that applies to SDA's, because the whole point of SDAs is to give files to people without PGP. If you're never going to have PGP in your environment, the answer is no i think.

Surely they can put them all into a folder and give it to you again in 1 SDA ? That would be the easiest option